Trokhymets М.Ya., Maltseva V.Ye., Vialushkin Ye.O., Аntonchik V.Ye., Moskalova Т.V., Polushyna M.V. Method and equipment for the safe development of preparatory workings in the gas-bearing coal seams

Details
Parent Category: Geo-Technical Mechanics, 2019
Category: Geo-Technical Mechanics, 2019, Issue 145

Geoteh. meh. 2019, 145, 108-118

https://doi.org/10.1051/e3sconf/201910900102

METHOD AND EQUIPMENT FOR THE SAFE DEVELOPMENT OF PREPARATORY WORKINGS IN THE GAS-BEARING COAL SEAMS

1Trokhymets М.Ya., 1Maltseva V.Ye.,2Vialushkin Ye.O.,1АntonchikV.Ye.,

3Moskalova Т.V., 3PolushynaM.V.

1Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, 2National Metallurgical Academy of Ukraine, 3National Technical University Dnipro Polytechnic

UDC 622.232.522. 24

Language: English

Abstract. The article describes a method and equipment for the safe development of preparatory working on a gas-bearing, outburst hazardous coal seam by a heading machine. The described method significantly prevents the gas emission during mining operations. Determination of the amount of degassing and relief wells is performed according to the given in article mathematical formulas. This ensures a significant increase in the level of safety processing the preparatory roadway on a gas-bearing, prone to outbursts coal seam by a heading machine. Due to this, the speed of conducting excavation increases and the cost of mining is reduced. Technological scheme of equipment placement for the implementation of the preparatory development method of preparatory work on a gas-bearing outburst hazardous coal seam by a heading machine is given. The proportionality coefficients of the mathematical models were determined. Mathematical models are used to calculate the number of relief and degassing wells, which are drilled during the impulse hydraulic loosing of the nearby part of the coal seam. Also the duration of liquid injection into a coal seam is also determined. Mathematical models for calculating the number of injection, unloading and degassing boreholes can be used in development of the passports for conducting preparatory workings on a gas-bearing, prone to outburst coal seam by a heading machine with a preliminary impulse hydraulic loosing of the nearby part of a coal seam. These will provide a significant increase in the level of safety when implementing the method of carrying out preparatory roadway in a prone to outburst gas-bearing seam by a heading machine, since all three conditions are simultaneously fulfilled according to the theory of preventing gas-dynamic phenomena: reducing the stress state of a gas-saturated coal formation by deforming the relief holes, reducing the gas pressure in the seam by pumping fluid into the injection boreholes and, as a result, gas displacement from the seam through the degassing bore-holes into the sealed part of the development, as well as the decrease of mechanical properties of the seam as a result of its wetting.measures and provide an opportunity to solve the problem of safe preparation of the emission of dangerous gas-bearing coal seams for the extraction of coal from them.

Keywords:heading machine, unloading and degassing boreholes, a preliminary impulse hydraulic loosing, gas-bearing outburst hazardous coal seam.

REFERENCES

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About the authors

Trohimets МyкolaYakovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher in the Department of Pressure Dynamics Control in Rocs, Institute of Geotechnical Mechanics named by M. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnіprо, Ukraine

Maltseva Vіra Yevhenivna, Master of Science, Principal Engineer in the Department of Pressure Dynamics Control in Rocs, Institute of Geotechnical Mechanics named by M. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnіprо, Ukraine

Vialushkyn Yehor Olehovych, Master of Science, Engineer, National Metallurgical Academy of Ukraine, Dnіprо, Ukraine

Antonchik Volodymyr Yevhenovych, Master of Science, Chief Designer in the Department of Pressure Dynamics Control in Rocs, Institute of Geotechnical Mechanics named by M. Poljakov of National Academy of Sciences of Ukraine (IGTM, NAS of Ukraine), Dnіprо, Ukraine

Moskalova Тetiana Vitaliivna, Candidate of Technical Science (Ph.D.), Associate Professor, Associate Professor in Department of Engineering and Design in Machinery Industry of National Technical University Dnipro Polytechnic (NTU “DP”), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Polushyna Maryna Vitaliivna, Candidate of Technical Science (Ph.D.), Associate Professor, Associate Professor in Department of Engineering and Design in Machinery Industry of National Technical University Dnipro Polytechnic (NTU “DP”), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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